TITLE: GCN CIRCULAR NUMBER: 9182 SUBJECT: Swift-BAT trigger 349718 is not a burst DATE: 09/04/21 08:34:30 GMT FROM: Phil Evans at U of Leicester P.A. Evans (U. Leicester), C.B. Markwardt (CRESST/GSFC/UMD) and J. Greiner (MPE) report on behalf of the Swift team: On 2009-04-21 at 07:30:19 UT Swift-BAT triggered on Swift trigger 34718. Swift slewed to the location after short delay due to an Earth limb constraint. The BAT on-board calculated location is RA, Dec 311.382, -72.578 which is RA(J2000) = 20h 45m 32s Dec(J2000) = -72d 34' 38" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). This was a rate trigger with a very low image significance (5.84 sigma). XRT and UVOT began observations 6 minutes after the trigger; no afterglow candidate is found. Given the very low image significance (5.84 sigma) and the lack of afterglow, we do not believe that this was a real GRB.